Examine source code of LessonWriter Lessonizer

{
  "name": "LessonWriter Lessonizer",
  "version": "1.0.4resigned1",
  "manifest_version": 2,
  "icons": {
    "128": "icon.png"
  },
  "description": "Create comprehensive literacy lesson plans and student materials from any content in minutes.",
  "author": "LessonWriter, Inc.",
  "homepage_url": "http://lessonwriter.com/",
  "background": {
    "scripts": [
      "URI.js",
      "bg.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "tabs",
    "cookies",
    "contextMenus",
    "http://lessonwriter.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3ed4e441-925b-4f8e-994d-982f41a9650d}"
    }
  }
}